Feed-water heater.



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` vamdmaggy UNITED STATES PATENT OFFICE.

GEORGE W. MWRIGH'IANI) PATRICK W. CASEY, OF N ORWICH, CONNECTICUT.

FEED-WATER HEATER.

Specification of Letters Patent.

Patented April 16, 190'?.

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The chief object of this invention is to provide in a single device simple and inexpensive means for protecting the fronts of steamboilers which'will also serve incidentally as a feed-water heater.

Y In order to explain our said invention clearly, we' have provided the annexed drawings, in which Figure 1 is a front-end view of a steam-boiler and furnace embodying our present improvements, and Fig. 2 is a detached and relatively enlarged perspective view of the feed-water-heating apparatus.

Referring to the drawings, the letter a indicates the boiler proper, b the front, in which the feed-door openingis located, andc denotes a base-plate located in said feed-door opening and serving as a support for our combined protective device and feed-water heater.

Our device is here shown as ap lied to a double-door opening, and it inc udes hollow rectangular castings d d', seated upon the opposite ends of plate c, and a similar hollow casting d2, located midway between the castin s d d.

he castings d d provide water-chambers at the outer sides of the feed-door openings, and the casting" d2 provides a like waterchamber between the two feed-door openings. Chambers d and d2 are connected near their upper'portions by pipes e e,and the chambers d and d are similarly connected by pipes e2 e", as is best seen in Fig. 2 of the drawings. The lower portion of chamber d is connected with the upper part ofthe boiler c by a pipe f. The letter g indicates a pipe that leads downwardly from boiler a and is connected with a feed-water-supply pi e g', that includes a cut-off valve h and a checlivalveh, which will allow the Water to enter through pipe g', but will be closed automatically by back pressure in said pipe.

Extending laterali)T from pipe g is a branch pipe 1c, that passes across the tops of the three chambers d', d2, and d and back again and thence kdownwardly to a point near the bottom of chamber d, where it enters said last-named chamber.

' In the line of pipe g we'liave located a cutoff valve m and a check-valve m. Valve m is ordinarily left o en, so that the water may circulate from boi er a downwardly through pipe g, thenc'e through 1pipe 7c and chambers 0l2 d, and finally bac pipef. When it is desired to utilize our deto boiler c throughscribed device'as a feed-water'heater, the

valve 'm is closed and valve 7L opened, when a fresh supply of water enters through pipe g', and being cut off from direct communication with the boiler a (by reason of the closed valve m) said water passes through vpipe 7c, and during such passage it becomes heated almost to the point of boiling before it enters chamber d. After a sufficient quantity of water has been fed into the boiler the valve is closed and valve m is'opened, when the water from boiler a continues to circulate through pipes g, le, and f and through chambers d, d2, and d, as we have already described.

upon thetops of the chambers cl2-d2, and d, forms a substantial support for the brickwork immediately over the feed-openings in the furnace-front, and thus locates said ipe where it is exposed to the iniiuence of) the hottest portions of the furnace-fire when the feed-doors are closed, thus raising the temperature of the water first fed through said pipe to the steaming-point before it is discharged into the water-chamber d.

The continuous circulation of water through the chambers d d d2 prevents the burnin out of the sidewalls of the feed-opening. his feature, however, we d o not claim, broadly, as of'our invention, as water-j acketed side Walls have been utilized heretofore; but the novelty of our present invention consists chiefly in combining with said water- The pipe lc, being carried back and forth by the Water is raised to thepoint of steamchambers, and means between seid feeding before it is discharged intothe chambers Water pipe and said chambers whereby the forming said Water-jackets.` Weter'ls heated before being (.ischarged into Having thus described our invention, wel! said chambers. 5 01mm* 1 GEORGE w. WRIGHT.

In combination with a boiler and the feedopening of al furnace, Water-chambers forining the side Wells of said opening, connec- Witnesses: tions between said chambers and the boiler, FRANK H. ALLEN,

Io a feed-water pipe discharging into one ofsaid ,I MADELINE D. RITCHIF..

PATRICK W. CASE AY. 

